p1131 b2 s1 = this is passenger side front o2 sensor correct? I did a search but really didn`t find an answer. I started getting this code ever since I installed my new exhaust.I dont see anything wrong with the wiring.

 

Yah P1131 is the driver's side primary, just behind the coolant reservoir and back underneath the firewall. Have fun replacing it, it's a *****. I found it much easier to remove the Y-Pipe and get several extensions along with a U-Joint to remove it.

I had the same code and replaced mine with a 4-wire universal, so far it's been working great. It's a lot cheaper than buying OEM.

 

ok its the drivers side, i thought it was the passenger side. thanks for your help.